As discussed previously, the Squadron Value is not neccessarily how many squadrons it is capable of carrying , but how many squadrons it is capable of coordinating ...
The GR75 nominally doesn't carry any... But if you are equipping it with an expanded hangar bay, youy're basically saying that you trashed all of the cargo capacity for a bay, launch systems and probably more Fighter C&C capacity...
Because equating Squadron Command to Carrying Capacity is fruitless once you get to the Imperial Star Destroyer, after all....
The best we have is that a Squadron base is a squadron , but the actual amount of fighters in that squadron is nebulous and undefined at best.